Jack



' Y c. H. GIVENS JACK 7 Filed Jilly f6, 1923 Sheets-Sheet l rP'ylINVENTOR ATTORNEY wrmsss: v

..Oct. 21, 1924.

C. H. GIVENS JACK.

Filed July 6, 1923 \ILl-lllllllllllll 2 Sheets-Sheet 2 I ATTdRNEYPatented Get. 21, 1924.

uni-ran stares A E-NT,Q C

' CHARLES HENRY'GIVE-NS, O3? MODESTO, CAL-IFO3NIA.-

Application filed. .Tu'ly (5,

To aZZ whomit may concern:

Be it known that 1, CHARLES H. GIvnNs, a citizen of the United States,residing at Modesto, in the county of Stanislaus and State ofCalifornia, have invented new and useful Improvements in Jacks, ofwhiohthe following is a specification.

This invention relates to a novel form of jack, the general object ofthe invention being to provide means whereby the ack can be raised andlowered by a. hand lever without manipulating a dog or clutch which isliable to cause injury to the operator.

Another object of the invention is to provide means whereby the jack canbe caused to drop without being lowered by a step by step movement andalso to provide means for lowering it by a step by step movement.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which 2- Figure1 is a front view of the device.

Figure 2 is a side view thereof.

Figure 3 is a rear view.

Figure 4 is a longitudinal sectional view.

Figure 5 is a section on line 55 of Fig ure 4. s

Figure 6 is a section on line 66 of Figure 4.

In these views 1 indicates a frame which is provided with the platforms2 and 3. At one of the rear sides the frame is provided with a rack 4. Abar 5 is slidably mounted in holes formed in the two platforms. thebottom of the bar having a foot 6 connected therewith and the top of thebar having a rest 7 swiveled thereto. A vertical slot 8 is formed in thebar and a rack 9 is placed in said slot. A slide 10 is slidably mountedon the bar and is located between the two platforms. A yoke 11 ispivoted to the slide and a catch 12 is pivoted to the yoke in such amanner that it will engage the rack 9 to hold the rack in adjustedposition. A hand lever 13 has its forked end pivoted to the lower partof the slide and a flange 14 is formed on the front part of the lowerplat- 1923. Serial n mesis.

form. for forming a fulcrum for the hand lever. I

When using the device the hand lever is pushed downwardly. so that itwill rock on its fulcrum and thus raise the slide which will also causethe bar to raise as the slide is connected with: the ,barbyi the catclnThe hand lever is then moved to the right so as to place the foot 6 inengagement with. one

hand lever is then raised again to raise the parts another step and atthe end of its movement the hand lever 1s swung to the right again toplace the foot in engagement with another notch. This action is kept upuntil the bar has been raised to a sufficient amount. If'the load is tobe dropped without a step by step movement the hand lever is lowered alittle and at the same time is swung to the left so as to release thefoot from the rack 4., Then the hand lever is raised until it strikesthe trigger or catch 12 to release the same by swinging the yoke 11andsaid catch upwardly and this will permit the bar and the load carriedthereby to drop. If a gradual downward movement is desired the handlever is raised slightly and at the same moved a slight distance to theleft. The hand lever is then moved a sufficient distance to place thefoot'6 over a notch of the rack 4 and then the hand lever is lifteduntil it strikes the catch hard enough to release the same so that thefoot on the bar can drop into the notch of rack 4. This action isrepeated until the parts are in lowered position.

Fromtheforegoing it will be seen that it is not necessary to move a dogor catch which is liable to injure the fingers as all the movements are.made with the. hand lever.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

.I desire it to be understood that I may make changes in theconstruction and in the combination and arrangement of the severalparts, provided thatsuch changes fall. within the scope of the appendedclaims.

What I claim is 1. A jack of the class described comprising a framehaving'a rack bar at its lower part, a bar slidably mounted in theframe,

a foot on the bar engaging the rack bar a slide on the 2;, catch on theslide; rack baion' the bat-'1 with whichthe'ditch ngages and a handlever pivoted totheelide and. having a part for engaging the catch.

2. A jack of the class described comprising a frame, including an upperand lower platform having openin e therein, a rack bar onthe lower part(I "the frfi'iiie, a rod pas ing t r ugh he Open g in the Pla fornis,'aTfoot'on the lowerend of the iod for engegingthe rack bar, a slide onthe rod.

errangecl between the two platforms, a reek on theb'gu, at catch on theglide for ehgeg ing the her, end a hancl lever pivoted to the slide endhaving a part da t d t ee ge h et h- 8, A of the Ql$ described compris-111g ai fffifriefinclucliiilg an uppefefid lower platform havingopenings therein, a rack bar on the lower part of the frame, a rodpassing through the openings "in the platform, a foot on the lower endof'the rod for engaging the rack bar, a slide on the fool and arrangedbetween the two platforms, a rack on the bar, a catch on the slide forengzi-gingthe rack bar al hand lever pivoteol to thesli de and having apart adapted to engage the catch and .a fulcrum for the handlevei" onthe lowei platform) In testimony whereof I 'i'fiix my signature i.

QHARPES HENR GIVENS

